public function testZscan()
{
$this->credis->zadd('sortedset', 0, 'name');
$this->credis->zadd('sortedset', 1, 'age');
$iterator = null;
$result = $this->credis->zscan($iterator, 'sortedset', 'n*');
$this->assertEquals($iterator, 0);
$this->assertEquals($result, ['name' => '0']);
}